20131227 has 8 divisors (see below), whose sum is σ = 29824080. Its totient is φ = 13420800.

The previous prime is 20131217. The next prime is 20131229. The reversal of 20131227 is 72213102.

It is not a de Polignac number, because 20131227 - 2⁴ = 20131211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20131229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 372774 + ... + 372827.

It is an arithmetic number, because the mean of its divisors is an integer number (3728010).

Almost surely, 2^20131227 is an apocalyptic number.

20131227 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20131227 is a deficient number, since it is larger than the sum of its proper divisors (9692853).

20131227 is an equidigital number, since it uses as much as digits as its factorization.

20131227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745610 (or 745604 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 20131227 is about 4486.7835918395. The cubic root of 20131227 is about 272.0341427368.

Adding to 20131227 its reverse (72213102), we get a palindrome (92344329).

It can be divided in two parts, 2013 and 1227, that added together give a triangular number (3240 = T₈₀).

The spelling of 20131227 in words is "twenty million, one hundred thirty-one thousand, two hundred twenty-seven".